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Diffstat (limited to 'websocketpp/common/cpp11.hpp')
| -rw-r--r-- | websocketpp/common/cpp11.hpp | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/websocketpp/common/cpp11.hpp b/websocketpp/common/cpp11.hpp new file mode 100644 index 00000000..492a3b8f --- /dev/null +++ b/websocketpp/common/cpp11.hpp @@ -0,0 +1,162 @@ +/* + * Copyright (c) 2014, Peter Thorson. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of the WebSocket++ Project nor the + * names of its contributors may be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL PETER THORSON BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifndef WEBSOCKETPP_COMMON_CPP11_HPP +#define WEBSOCKETPP_COMMON_CPP11_HPP + +/** + * This header sets up some constants based on the state of C++11 support + */ + +// Hide clang feature detection from other compilers +#ifndef __has_feature // Optional of course. + #define __has_feature(x) 0 // Compatibility with non-clang compilers. +#endif +#ifndef __has_extension + #define __has_extension __has_feature // Compatibility with pre-3.0 compilers. +#endif + +// The code below attempts to use information provided by the build system or +// user supplied defines to selectively enable C++11 language and library +// features. In most cases features that are targeted individually may also be +// selectively disabled via an associated _WEBSOCKETPP_NOXXX_ define. + +#if defined(_WEBSOCKETPP_CPP11_STL_) || __cplusplus >= 201103L || defined(_WEBSOCKETPP_CPP11_STRICT_) + // This check tests for blanket c++11 coverage. It can be activated in one + // of three ways. Either the compiler itself reports that it is a full + // C++11 compiler via the __cplusplus macro or the user/build system + // supplies one of the two preprocessor defines below: + + // This is defined to allow other WebSocket++ common headers to enable + // C++11 features when they are detected by this file rather than + // duplicating the above logic in every common header. + #define _WEBSOCKETPP_CPP11_INTERNAL_ + + // _WEBSOCKETPP_CPP11_STRICT_ + // + // This define reports to WebSocket++ that 100% of the language and library + // features of C++11 are available. Using this define on a non-C++11 + // compiler will result in problems. + + // _WEBSOCKETPP_CPP11_STL_ + // + // This define enables *most* C++11 options that were implemented early on + // by compilers. It is typically used for compilers that have many, but not + // all C++11 features. It should be safe to use on GCC 4.7-4.8 and perhaps + // earlier. + #ifndef _WEBSOCKETPP_NOEXCEPT_TOKEN_ + #define _WEBSOCKETPP_NOEXCEPT_TOKEN_ noexcept + #endif + #ifndef _WEBSOCKETPP_CONSTEXPR_TOKEN_ + #define _WEBSOCKETPP_CONSTEXPR_TOKEN_ constexpr + #endif + #ifndef _WEBSOCKETPP_INITIALIZER_LISTS_ + #define _WEBSOCKETPP_INITIALIZER_LISTS_ + #endif + #ifndef _WEBSOCKETPP_NULLPTR_TOKEN_ + #define _WEBSOCKETPP_NULLPTR_TOKEN_ nullptr + #endif + #ifndef _WEBSOCKETPP_MOVE_SEMANTICS_ + #define _WEBSOCKETPP_MOVE_SEMANTICS_ + #endif + #ifndef _WEBSOCKETPP_DEFAULT_DELETE_FUNCTIONS_ + #define _WEBSOCKETPP_DEFAULT_DELETE_FUNCTIONS_ + #endif + + #ifndef __GNUC__ + // GCC as of version 4.9 (latest) does not support std::put_time yet. + // so ignore it + #define _WEBSOCKETPP_PUTTIME_ + #endif +#else + // In the absence of a blanket define, try to use compiler versions or + // feature testing macros to selectively enable what we can. + + // Test for noexcept + #ifndef _WEBSOCKETPP_NOEXCEPT_TOKEN_ + #ifdef _WEBSOCKETPP_NOEXCEPT_ + // build system says we have noexcept + #define _WEBSOCKETPP_NOEXCEPT_TOKEN_ noexcept + #else + #if __has_feature(cxx_noexcept) + // clang feature detect says we have noexcept + #define _WEBSOCKETPP_NOEXCEPT_TOKEN_ noexcept + #elif defined(_MSC_VER) && _MSC_VER >= 1900 + // Visual Studio 2015+ has noexcept + #define _WEBSOCKETPP_NOEXCEPT_TOKEN_ noexcept + #else + // assume we don't have noexcept + #define _WEBSOCKETPP_NOEXCEPT_TOKEN_ + #endif + #endif + #endif + + // Test for constexpr + #ifndef _WEBSOCKETPP_CONSTEXPR_TOKEN_ + #ifdef _WEBSOCKETPP_CONSTEXPR_ + // build system says we have constexpr + #define _WEBSOCKETPP_CONSTEXPR_TOKEN_ constexpr + #else + #if __has_feature(cxx_constexpr) + // clang feature detect says we have constexpr + #define _WEBSOCKETPP_CONSTEXPR_TOKEN_ constexpr + #elif defined(_MSC_VER) && _MSC_VER >= 1900 + // Visual Studio 2015+ has constexpr + #define _WEBSOCKETPP_CONSTEXPR_TOKEN_ constexpr + #else + // assume we don't have constexpr + #define _WEBSOCKETPP_CONSTEXPR_TOKEN_ + #endif + #endif + #endif + + // Enable initializer lists on clang when available. + #if __has_feature(cxx_generalized_initializers) && !defined(_WEBSOCKETPP_INITIALIZER_LISTS_) + #define _WEBSOCKETPP_INITIALIZER_LISTS_ + #endif + + // Test for nullptr + #ifndef _WEBSOCKETPP_NULLPTR_TOKEN_ + #ifdef _WEBSOCKETPP_NULLPTR_ + // build system says we have nullptr + #define _WEBSOCKETPP_NULLPTR_TOKEN_ nullptr + #else + #if __has_feature(cxx_nullptr) + // clang feature detect says we have nullptr + #define _WEBSOCKETPP_NULLPTR_TOKEN_ nullptr + #elif defined(_MSC_VER) &&_MSC_VER >= 1600 + // Visual Studio version that has nullptr + #define _WEBSOCKETPP_NULLPTR_TOKEN_ nullptr + #else + // assume we don't have nullptr + #define _WEBSOCKETPP_NULLPTR_TOKEN_ 0 + #endif + #endif + #endif +#endif + +#endif // WEBSOCKETPP_COMMON_CPP11_HPP |